Specification of a digital interface device text Geneva International Electrotechnical Commission 1998 1.0 monographic 21 p. Specifies the electrical and mechanical requirements for a digital interface device to allow a general-purpose control device such as a desktop computer to be connected to hearing aids, for the purpose of electrical setting of their operating parameters. Provides a specification such that all hearing aids which can be programmed by the specified digital interface device may have their parameters set by a single control device and interface device. Hearing aids